Hardware Spec Index

Novexa PW-5558 Ultra 550W 80 PLUS Bronze ATX 3.0 Power Supply

Power Supplies · Novexa · SKU PW5558-ULTRA · Released 2023 · Updated 2026-10-20

Key facts

Benchmark index856 (Power Supplies scale)
Category rank#18,356
Street price$39
Power550 W (rated)
Performance per dollar21.95
Released2023

Specifications

BrandNovexa
ModelNovexa PW-5558 Ultra
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorATX
ModularityNon-modular
Fan140 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty7 years

Related guides

80 PLUS Efficiency Ratings ExplainedATX 3.1 Power Supplies and the 12V-2x6 Connector

Similar Power Supplies

ModelBenchmarkPriceCompare
Novexa PW-8910 SE 1300W 80 PLUS Platinum ATX 3.0 Power Supply2,897$399Compare
Teralux PW-4420 Prime 1200W 80 PLUS Platinum ATX Power Supply2,333$199Compare
Caldera PW-7729 Ti 1000W 80 PLUS Gold ATX 3.1 Power Supply1,678$119Compare
Caldera PW-3231 Pro 1000W 80 PLUS Titanium ATX 3.1 Power Supply2,190$249Compare
Teralux PW-4919 Ultra 850W 80 PLUS Gold ATX 3.0 Power Supply1,756$129Compare
Caldera PW-3589 Pro 850W 80 PLUS Gold ATX 3.0 Power Supply1,669$129Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-5558 Ultra 550W 80 PLUS Bronze ATX 3.0 Power Supply”, https://vextor7.com/item/20070307 (accessed 2026-10-20).